WERF Report (Project 00-CTS-10Ta)
Ebook only
Available as an ebook
Please purchase via www.iwaponline.comOpens in new window
Also part of Water Intelligence Online Digital Reference Library
Standard ePrice: £28.00
+ VAT
Ebook only
Available as an ebook
Please purchase via www.iwaponline.comOpens in new window
Also part of Water Intelligence Online Digital Reference Library
Standard ePrice: £28.00
+ VAT
As a result of an evaluation of biomass reduction technologies, anaerobic treatment was found to have potential for the lowest level of biomass production in the treatment of municipal and industrial wastewaters. A limitation of anaerobic wastewater treatment processes for dilute wastewaters and at cold temperatures is the ability to maintain a significant level of methanogenic organisms in the reactor to sustain efficient treatment. A process consisting of an anaerobic baffled reactor followed by membrane separation was proposed for the treatment of low strength wastewaters at colder temperatures. A 4 gpm pilot plant facility was assembled and installed at the West Point wastewater treatment plant in Seattle, to test the feasibility of the anaerobic/membrane separation treatment system. During a 7 month period, 3 different attempts were made for system start up with the result of little methanogenic activity in the anaerobic baffled reactor system. The temperatures during the start up ranged from 10 to 15ᄚC and may have been a significant factor in the inability to generate a significant methanogenic population within the time available.
Another aspect of this continuing study to investigate biomass reduction was a cost analysis to evaluate the potential for an anaerobic/membrane process for biomass reduction. The cost analysis showed that the significant capital expenditure for adding a membrane reactor to retrofit an existing secondary treatment system resulted in a greater annual amortization costs than the significant operational cost savings realized by less sludge production, less aeration hp, and excess methane gas production. Because the membrane separation system represented about 90% of the retrofit costs, the cost analysis suggests that a less expensive method be pursued for liquid solids separation after anaerobic treatment of low strength wastewaters.
This publication can be purchased and downloaded via Pay Per View on Water Intelligence Online - click on the Pay Per View icon below
This project addresses the successful nitrogen and phosphorus removal technologies being implemented at existing wastewater treatment plants (WWTPs), some key challenges...
The long-term viability and sustainability of biosolids land application is dependent on continuously earning stakeholder confidence, trust and support. This requires ongoing and effective...
Advances in microbial source tracking have enabled communities to gain more information about the specific hosts that may be responsible for elevated indicator bacteria levels in recreational...
In this study, a two-step approach was used to develop new sample detection and processing methods that facilitate the application of molecular techniques to uses and...
CARE-W was a joint European initiative to develop a framework for water network rehabilitation. The project was supported by the European Commission under the Fifth Framework...
The lack of knowledge on the performance of innovative wastewater rehabilitation technologies, specifically for large-diameter pipes, and the limited ability to determine the...
This study, on innovative methods for the capture of metals from stormwater, mainly focused on two major areas of investigation: media filters and swales.
Twelve media were chosen for...
Thermal enrichment of coldwater streams by heated stormwater in summer months is often overlooked and even exacerbated by traditional management practices that typically account for flow...